发明名称 |
Steel sheet for hot stamping member and method of producing same |
摘要 |
A steel sheet for a hot stamping member contains, as a chemical composition, 0.10 mass % to 0.35 mass % of C; 0.01 mass % to 1.0 mass % of Si; 0.3 mass % to 2.3 mass % of Mn; 0.01 mass % to 0.5 mass % of Al; limited to 0.03 mass % or less of P; limited to 0.02 mass % or less of S; limited to 0.1 mass % or less of N; and a balance consisting of Fe and unavoidable impurities, in which a standard deviation of diameters of iron carbides which are contained in a region from a surface to a ¼ thickness position of the steel sheet is less than or equal to 0.8 μm. |
申请公布号 |
US9617624(B2) |
申请公布日期 |
2017.04.11 |
申请号 |
US201214112414 |
申请日期 |
2012.04.26 |
申请人 |
NIPPON STEEL SUMITOMO METAL CORPORATION |
发明人 |
Tanahashi Hiroyuki;Maki Jun |
分类号 |
B32B15/10;C22C38/54;B21D22/02;B21D37/16;C22C38/00;C22C38/02;C22C38/04;C22C38/06;C22C38/08;C22C38/12;C22C38/14;C22C38/16;C22C38/28;C22C38/32;B32B15/01;C21D8/02;C22C38/22;C22C38/24;C22C38/26;C22C38/42;C22C38/50;C23C2/02;C23C2/06;C23C2/12;C23C2/28;C23C2/40;C21D1/673 |
主分类号 |
B32B15/10 |
代理机构 |
Birch, Stewart, Kolasch & Birch, LLP |
代理人 |
Birch, Stewart, Kolasch & Birch, LLP |
主权项 |
1. A steel sheet for producing a hot stamping member, the steel sheet comprising, as a chemical composition:
0.10 mass % to 0.35 mass % of C; 0.01 mass % to 1.0 mass % of Si; 0.3 mass % to 2.3 mass % of Mn; 0.01 mass % to 0.5 mass % of Al; limited to 0.03 mass % or less of P; limited to 0.02 mass % or less of S; limited to 0.1 mass % or less of N; and a balance of Fe and unavoidable impurities, wherein a standard deviation of diameters of iron carbides which are contained in a region from a surface to a ¼ thickness position of the steel sheet is less than or equal to 0.8 μm and an average value of a size of the iron carbides which are contained in the region from the surface to the ¼ thickness position of the steel sheet is 1.0 μm or more and 2.0 μm or less. |
地址 |
Tokyo JP |